A method for attaching or detaching a filmstrip to a film cartridge

Abstract: A cartridge and method for attaching or detaching a filmstrip (16) to/from a cartridge (10). The film cartridge (10) includes a spool (14) rotatably mounted therein and an opening (28) for allowing a filmstrip (16) to be inserted or removed therefrom. The cartridge (10) also includes a moveable section with respect to the cartridge which does not substantially effect the operation of the spool (14) and a locking mechanism for locking and unlocking the moveable section with respect to the cartridge (10). The moveable section forms an access opening (34) for allowing inserting of a tool (66) for attaching or detaching the filmstrip (16) to/from the spool (14).

Description: Cross Reference to Related Applications Reference is made to commonly assigned application No. EP 94 111 202.1, corresponding to EP-A-0 636 924, entitled "A Tool and Method For Detaching a Trailing End Portion of a Filmstrip From a at Least One Hook Atop a Ramp on a Film Spool Inside a Film Cartridge", by Thomas C. Merle, Dale W. Ryan and David L. Rowden; and Application No. EP 94 120 032.1, corresponding to EP-A-0 660 165, entitled "Method and Apparatus For Attaching or Detaching a Filmstrip to a Film Cartridge", by Thomas C. Merle and Dale W. Ryan. Field of the Invention The present invention relates to a method for attaching or detaching a filmstrip to a cartridge. BACKGROUND OF THE INVENTION Prior art mechanism for attaching or detaching a filmstrip to a cartridge rely on the precise positioning of the cartridge and the tool used during the attachment or detachment procedure. The foregoing technique imposes tight restrictions on the cartridge specification, the manufacturing techniques used to make the cartridge, the precise manufacturing of the tool and mechanism used for engaging the tool with the cartridge so as to ensure proper orientation between the tool and cartridge. Certain cartridges, such as the type disclosed in U.S. Patent Nos. 5,215,273 and 5,031,852 and in the EP 0 582 852-A1 and EP 0 636 924-A1 as well, require significant spacing between internal cartridge features for allowing attachment of the filmstrip directly to the spool. Thus, there exists a problem in providing a method and apparatus which allows for the attachment or removal of a filmstrip without accounting for precise control between the tool and cartridge. SUMMARY OF THE INVENTION In one aspect of the present there-is provided a method of attaching or detaching a filmstrip to a film cartridge having a spool rotatably mounted therein and an opening for allowing the filmstrip to be inserted or removed therefrom. The cartridge also includes a moveable section with respect for the cartridge which does not substantially effect the operation of the spool. A lock mechanism is provided for locking and unlocking the moveable section with respect to the cartridge. The method comprises the steps according to claim 1. The present invention is directed to a method for attaching or detaching a filmstrip from a cartridge which eases the restrictions on the tolerances of the cartridge, the equipment used to manufacture the cartridge and the alignment of the tools used to attach or detach the filmstrip with respect to the cartridge. DETAILED DESCRIPTION OF THE DRAWINGS Referring the Figure 1, there is illustrated an exploded perspective view of a cartridge made in accordance with the present invention; Referring to Figure 2, there is illustrated a perspective view of the cartridge of Figure 1; Figure 3 is similar to Figure 2 partially broken away to illustrate how the cartridge is secured together; Figure 4 illustrates the cartridge in the open state and the relative positioning of a tool used for attaching and/or detaching a filmstrip from the spool; Figure 5 is a top plan view of the trailing end portion of a filmstrip for use with the cartridge; Figure 6 is a front elevational view of the spool of the cartridge of Figure 1; and Figure 7 is a cross sectional view of the spool of Figure 6 as taken along line 7-7. DETAILED DESCRIPTION Referring now to the drawings, there is illustrated a film cartridge 10 for receiving a filmstrip 16. It is to be understood that any size filmstrip may be employed with the cartridge of the present invention, and in the particular embodiment illustrated, a 24mm size filmstrip is employed. A film cartridge 10 comprises an upper shell half 12 and a lower shell half 13. A film spool 14 is rotatably mounted to the lower shell half 13 and for rotation about an axis x-x in film winding and unwinding directions U and W inside the cartridge 10. The two shell halves 12,13 are secured together by interlocking projections and recesses. In particular, one of the shell halves 12,13 is provided with a pair of projections 15 having a terminal end 17 which engages a mating recess 19 formed in the adjacent shell half. The projections 15 and recesses 19 disposed at the lower edges 21,23 of the shell halves 12,13, respectively. The projections 15 and mating recesses 19 are formed such that when the other upper ends 25,27 of the shell halves 12,13 are opened open, the two shell halves pivot about the lower edges 21,23. A projection 29 is provided in upper shell half 12 which is designed to engage an opening 31 in the lower shell half 13. The projection 29 and mating opening are sized and shaped such that projection 29 substantially fills opening 31. As illustrated, the projection 29 is provided at the end of a flexible member 32 which allows the projection 29 to be deflected a sufficient distance so as to allows disengagement and engagement with opening 31 as is later discussed herein. In the embodiment illustrated, lead portion 33 of projection 29 is beveled so as to assist in snapping projection into opening 31 as discussed later herein. The filmstrip 16 is coiled about the film spool 14 to form successive convolutions of the filmstrip 16. Filmstrip 16 includes an inner or trailing end portion 18 (see Figure 5) which is removably secured to the spool 14 (see Figures 6 and 7). In the particular embodiment illustrated, the trailing end portion 18 is provided with a pair of openings 20 which are designed to engage a pair of projections 22 formed in the hub 24 of the spool 14. The trailing end portion 18 is further provided with a drive opening 26 which, in the particular embodiment illustrated, is designed to engage an attachment tool, not shown, so that the trailing edge portion 18 can be guided into the cartridge for attaching the filmstrip 16 to the spool 14. One suitable method of attaching the filmstrip 16 to the spool 14 is described in application No. EP 94 120 032.1, entitled "Method and Apparatus for Attaching or Detaching a Filmstrip to a Film Cartridge", by Thomas C. Merle and Dale W. Ryan. The cartridge 10 is provided with a slot 28 for allowing a filmstrip 16 to be inserted or removed from the cartridge 10. In the particular embodiment illustrated, the opening 28 has a substantially rectangular configuration. The particular height h and width w of the opening 28 is selected in accordance with the requirements of the cartridge and film size. In the particular embodiment illustrated, the opening 28 has a height h of 0,30 cm (12 inches) and a width w of 2.84 cm (1.12 inches). The opening 28 is typically provided in a projecting portion 29 of the cartridge 10. Appropriate means are provided in the projecting portion 29 of the cartridge 10 which prevents ambient light from entering the cartridge through opening 28. This may take the form of a typical plush as typically found in many current 35mm film cartridges, or may comprise of a light valve such as disclosed in U.S. Patent Nos. 5,215,273 and 5,031,852, previously referred to. Referring to Figures 6 and 7, there is illustrated an enlarged view of the spool 14. The spool 14 includes a pair of spaced projections 22 disposed in the central area of the hub 24 and are designed to engage openings 20 in the trailing end portion 18 of filmstrip 16. Preferably, as illustrated, projections 22 are provided with an inclined surface 52 which assists in the attachment of the filmstrip 16 as is discussed later herein. Spool 14 is also provided with a pair of flexible retaining members 54 which extend from each of the lateral ends 56. Retaining members each terminate in a downwardly extending contact members 58. The flexible retaining members 54 assist in retaining the trailing end 18 of the filmstrip 16 on the spool 14 once projections 22 engage openings 20. The cartridge 10 is designed to be placed in an apparatus 8, for example, a photofinishing device such as a processor, printer, or any other device where it is necessary to insert or remove the filmstrip from the cartridge. In the particular embodiment illustrated, apparatus 8 includes means for securely holding the cartridge 10 in a fixed position. In the particular embodiment illustrated, the apparatus includes a lower retaining member 62 which is used to maintain the lower shell half 13 in a fixed position relative to the frame 60. A pair of mounting member 67 rotatably mounted to the frame 60 are provided for engaging the lateral ends of the spool 14. One of the mounting members 67 is driven for winding or unwinding the filmstrip 16 on to the spool 14. A stepper motor could be used to drive mounting member 67. The mounting member 67 also holds the spool 14 in position when the cartridge 10 is opened as is discussed later herein. The apparatus may be further provided with an attachment/detachment tool 66 which is rotatably mounted to the frame 60 for moving between an engaged position and a non-engaged position with respect to the cartridge 10. Referring to Figure 4, an attachment tool 66 is illustrated in the non-engaged position. In order to allow appropriate access to the interior of the cartridge 10 while minimizing the degree of precision in which the cartridge must be made and the precise positioning of the tool 66, the upper shell half 12 of the cartridge is made such that a wide access opening 43 is provided between the upper and lower shell halves 12,13. In particular, when upper projection 29 is pushed inward by an appropriate tool a sufficient distance, as indicated by arrow 46 in Figure 3, the projection 29 will disengage from opening 31. An appropriate grasping tool/mechanism, not shown, is used to apply a separating force at the edges, in a direction as indicated by arrow 48 in Figure 3, the two halves 12,13 will be rotated apart allowing the upper shell half to pivot about the lower edges. The upper edges 23,27 of the shell halves 12,13 are moved a predetermined distance D apart such that an access opening 43 is provided. The distance D is Figure 4 is greatly exaggerated for the purpose of clarity in viewing the cartridge features. Preferably, the rotation of the upper shell half 12 is such that an access area of sufficient size is provided to allow easy access of a tool within the cartridge 10 for attaching or detaching the filmstrip 16 to the spool 14. Preferably, the distance D is at least 2.5mm and preferably is in the range of 3mm to 5mm. It is, of course, understood that the size of the access opening 34 will vary depending on the cartridge configuration and the requirements of the tool used to attach or detach the filmstrip. The distance D is preferable such that the filmstrip 16 can be wound or unwound while the cartridge is in the open state. Thereafter, the tool 66 is positioned in the engaged position for allowing attachment or detachment of the film to the spool 14. A more detailed description of a attachment/detachment tool and method of attachment/detachment of the filmstrip to the spool which can be used in the present invention is described in EP-A-0 636 924 and EP-A-0 660 165 previously referred to. After attachment or detachment of the filmstrip 16 has occurred, the tool 66 is removed and the upper shell half 12 is closed with respect to the bottom shell half 13. In the particular embodiment illustrated, this is accomplished by moving the top shell half 12 toward shell half 13 so as to allow the projection 29 to slide and ride upon the side of the lower shell half 13 until it snaps into the opening 31 thereby locking the bottom and top shell halves 12,13 together. Pushing on areas 65 of shell half 12 is preferably used as the area for applying a closing force since a pair of slots 68 provided adjacent the flexible member 32 which assists in allowing projection 29 to deform slightly during the snapping together of the bottom and top shell halves 12,13. It is to be understood that various locking and unlocking mechanisms may be used for securing the top shell half 12 and bottom shell half 13 together. Additionally, various other means may be provided for allowing separation of the top shell half with respect to the bottom shell half 13. For example, a hinge may be used to allow the shell half 12 to pivot at lower edges 21,23. While in the preferred embodiment the entire top shell half 12 is removed, it is to be understood that only a section or portion thereof need be removed for allowing insertion of a tool into the cartridge 10 for attaching or detaching the filmstrip 16. It is to be understood that various other changes and modifications may be made without departing from the scope of the present invention. The present invention being defined by the claims that follow. Parts List: 8 apparatus 10 cartridge 12 upper shell half 13 lower shell half 14 spool 15 projections 16 filmstrip 17 terminal end 18 trailing end portion 19 recess 20 openings 21,23 lower edge 22 projections 24 hub 25,27 upper ends 26 drive opening 28 opening 29 projecting portion 31 opening 32 flexible member 33 lead portion 34 access opening 41 upper projection 43 access opening 46,48 arrows 52 inclined surface 54 retaining members 56 lateral ends 58 contact members 60 frame 62 clamp members 65 areas 66 attachment tool 67 mounting members 68 slots

Claims: Method of attaching or detaching a filmstrip (16) to a film cartridge (10), said cartridge comprising a spool (14) rotatably mounted therein and an access opening (28) for allowing said filmstrip to be inserted or removed from said cartridge in the assembled condition, said cartridge (10) comprising a first shell portion (12) and a second shell portion (13), said first and second shell portions being secured such that said first shell portion can be pivotably moved with respect to the bottom shell portion so as to form an access opening (28) for allowing attachment of the filmstrip to the spool, latching means (29,31-33) for locking and unlocking said shell portions with respect to to each other, comprising the steps of: a) unlatching said latching means so that said first shell portion (12) is capable of being moved with respect to said second shell portion (13); b) opening said first shell portion so as to form an access opening for allowing attachment of the filmstrip (16) to the spool (14); c) providing a tool designed to attach or detach the filmstrip (16) to said spool; d) moving said tool (66) into said cartridge through said access opening to a position which would allow the filmstrip (16) to be secured to or detached with respect to said spool; e) attaching or detaching said filmstrip to said spool (14); f) removing said tool from said cartridge (10); and g) closing said first shell half (12) with respect to said second shell (13) half and locking said latching means so as to return the cartridge (10) to its normally closed condition. A method according to Claim 1, wherein said cartridge (10) is of the thrust type wherein the filmstrip (16) may be thrust of the film opening by rotating the spool (14). A method according to claim 1 further comprising the step of winding or unwinding said filmstrip (16) about said spool.

Inventors: MERLE THOMAS CLARK, MERLE, THOMAS CLARK, MERLE, THOMAS CLARK, C/O EASTMAN KODAK COMPANY
Applicants: EASTMAN KODAK CO, EASTMAN KODAK COMPANY
Application year: 1994
Main classification: G03B17
IPC codes: G03C3, G03B1, G03B17, G03B23